package com.atguigu.gulimall.order.listener;

import com.alipay.api.AlipayApiException;
import com.alipay.api.internal.util.AlipaySignature;
import com.atguigu.gulimall.order.config.AlipayTemplate;
import com.atguigu.gulimall.order.service.OrderService;
import com.atguigu.gulimall.order.vo.PayAsyncVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * @Author : Jungle
 * @Description :
 * 支付宝异步通知
 */
@RestController
public class OrderPayedListener {
    @Autowired
    private OrderService orderService;
    @Autowired
    private AlipayTemplate alipayTemplate;
    @PostMapping("/payed/notify")
    public String handleAliPayed(PayAsyncVo vo, HttpServletRequest request) throws AlipayApiException, UnsupportedEncodingException {
        //只要我们收到支付宝的异步通知，告诉我们订单支付成功，，返回success，支付宝就再也不通知
        //Map<String, String[]> map = request.getParameterMap();
        //for (String key : map.keySet()) {
        //    String value = request.getParameter(key);
        //    System.out.println("参数名："+key+" 参数值： "+value);
        //}
        //System.out.println("支付宝通知到位了，数据是=="+ JSON.toJSONString(map));
      //  1、验签
        boolean signVerified = aliPayVerified(request);

        if (signVerified) {
            System.out.println("签名验证成功,修改订单状态");


            //2、修改订单状态，并保存交易流水
            String result=  orderService.handlePayResult(vo);
            //正常返回“success”
            return result;
        }else {
            //验证失败只要不返回success就可以
            System.out.println("签名验证失败");
            return "error";
        }
    }




    /**
     * 1、验签
     */
    private boolean aliPayVerified(HttpServletRequest request) throws AlipayApiException {
        //获取支付宝POST过来反馈信息
        Map<String,String> params = new HashMap<String,String>();
        Map<String,String[]> requestParams = request.getParameterMap();
        for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {
            String name = (String) iter.next();
            String[] values = (String[]) requestParams.get(name);
            String valueStr = "";
            for (int i = 0; i < values.length; i++) {
                valueStr = (i == values.length - 1) ? valueStr + values[i]
                        : valueStr + values[i] + ",";
            }
            //乱码解决，这段代码在出现乱码时使用
            //valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
            params.put(name, valueStr);
        }

        //调用SDK验证签名
        return AlipaySignature.rsaCheckV1(params, alipayTemplate.getAlipay_public_key(), alipayTemplate.getCharset(), alipayTemplate.getSign_type());
    }
}
